/*
 * Copyright (C) 2013 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.squareup.picasso;

public enum NetworkPolicy {
    /** Skips checking the disk cache and forces loading through the network. */
    NO_CACHE(1 << 0),

    /**
     * Skips storing the result into the disk cache.
     */
    NO_STORE(1 << 1),

    /** Forces the request through the disk cache only, skipping network. */
    OFFLINE(1 << 2);

    /**
     * shouldReadFromDiskCache
     *
     * @param networkPolicy int
     * @return boolean
     */
    public static boolean shouldReadFromDiskCache(int networkPolicy) {
        return (networkPolicy & NetworkPolicy.NO_CACHE.index) == 0;
    }

    /**
     * shouldWriteToDiskCache
     *
     * @param networkPolicy int
     * @return boolean
     */
    public static boolean shouldWriteToDiskCache(int networkPolicy) {
        return (networkPolicy & NetworkPolicy.NO_STORE.index) == 0;
    }

    /**
     * isOfflineOnly
     *
     * @param networkPolicy int
     * @return boolean
     */
    public static boolean isOfflineOnly(int networkPolicy) {
        return (networkPolicy & NetworkPolicy.OFFLINE.index) != 0;
    }

    final int index;

    NetworkPolicy(int index) {
        this.index = index;
    }
}
